Use official openssl repository

README.rst

@@ -47,15 +47,12 @@ branch) as crypto backend:
 
 * OpenSSL (https://github.com/openssl/openssl/)
 
-At the moment, the patched OpenSSL is required to compile ngtcp2 to
-enable 0-RTT.  See below.
-
 Build from git
 --------------
 
 .. code-block:: text
 
-   $ git clone --depth 1 -b early-exporter https://github.com/tatsuhiro-t/openssl
+   $ git clone --depth 1 https://github.com/openssl/openssl
    $ cd openssl
    $ # For Linux
    $ ./config enable-tls1_3 --prefix=$PWD/build

ci/build_openssl.sh

@@ -2,7 +2,7 @@
 #build last openssl master (for Travis)
 
 cd ..
-git clone --depth 1 -b early-exporter https://github.com/tatsuhiro-t/openssl
+git clone --depth 1 https://github.com/openssl/openssl
 cd openssl
 ./config enable-tls1_3 --prefix=$PWD/build
 make -j$(nproc)